Compatible with mainbord

[Jeroen]

I have a relatively simple question.

I found this item :
http://cgi.benl.ebay.be/1024MB-DDR4...7953QQcategoryZ108216QQtcZphotoQQcmdZViewItem

2 questions. Is this 2 * 512Meg or 1* 1024 Meg and my motherboard is
'MSI K8N NEO'. Can I use it.
I would really appreciate it if somebody who knows exactly how memory
works can tell me if it is compatible.
Thanks in advance,

Jeroen

 

[Erick]

Yes, you can use it, so long as the RAM is good. Always be careful of
anything bought on ebay (seller ratings can be faked).


I have a relatively simple question.

I found this item :
http://cgi.benl.ebay.be/1024MB-DDR4...7953QQcategoryZ108216QQtcZphotoQQcmdZViewItem

2 questions. Is this 2 * 512Meg or 1* 1024 Meg and my motherboard is
'MSI K8N NEO'. Can I use it.
I would really appreciate it if somebody who knows exactly how memory
works can tell me if it is compatible.
Thanks in advance,

Jeroen

 

[Paul]

Yes, you can use it, so long as the RAM is good. Always be careful of
anything bought on ebay (seller ratings can be faked).

What I noticed about that Ebay sale, is there is no part number
for the memory module. Some Ebay sellers (the guys who sell
Rambus modules) include a part number and no description, which
leaves it to the buyer to figure out whether the module is
appropriate or not. This seller has chosen to provide absolutely
no usable info concerning construction of the module.

A 1GB module can be constructed with (16) 64Mx8 chips, or it
can be constructed with 128Mx4 chips. The second construction
technique means cheaper chips can be used, so the seller makes
more money. But those modules can cause loading problems for
the motherboard.

This advertisement, is the responsible way to market the
two possible kinds of 1GB modules. Notice how the cheap modules
are only compatible with certain chipsets. The modules using
64Mx8 chips are more expensive, but more likely to work with a
wider range of motherboards. I would email the seller and ask
for construction details for the product.

http://www.portatech.com/catalog/memory.asp?ID=285

A guy who won't provide details, is likely a weasel.

Paul

 

[Jeroen]

Paul from where are you? USA?
Maybe it is interesting to buy from there?

That site you mention... Do you buy there?

And thanks for the info already given.

 

[Paul]

Paul from where are you? USA?
Maybe it is interesting to buy from there?

That site you mention... Do you buy there?

And thanks for the info already given.

No, I didn't buy from Portatech. I quote that web site
because they were honest in their sales pitch. There
are many other sellers who will sell you 128Mx4 RAM
chips on their 1GB DIMMs, without warning you of the
consequences. I personally prefer brand name memory,
something with a long warranty, as I've had two batches
of generic RAM die just outside of the one year warranty.

Paul

 

[Jeroen]

Well I have the part number of the memory now, but haven't tested yet :
it is : HYB25D512400BE-5
more info on it : 1Gb PC400 1205 AN 02 16C

I can't fint much info on the net
Anyone familiar with it ?

 

[Erick]

The PC400 part tells me that they are not compatible. It is DDR2, while the
board uses DDR (DDR1).

 

[Jeroen]

Thx but well it worked
So I can recommend it. Although not on all chipsets I guess. But on my
nforce250 it did.

 

[CBFalconer]

Thx but well it worked
So I can recommend it. Although not on all chipsets I guess.
But on my nforce250 it did.

What is it, what did it work on? Your message is totally useless
without proper context. Most Usenet readers have no access to any
preceding messages. Even on the abysmally broken Google interface
to usenet you can generate proper messages with proper context.
See my sig below. Make sure you read the URL reference before
posting again.

--
"If you want to post a followup via groups.google.com, don't use
the broken "Reply" link at the bottom of the article. Click on
"show options" at the top of the article, then click on the
"Reply" at the bottom of the article headers." - Keith Thompson
More details at: <http://cfaj.freeshell.org/google/>

 

[Erick]

What is it, what did it work on? Your message is totally useless
without proper context. Most Usenet readers have no access to any
preceding messages. Even on the abysmally broken Google interface
to usenet you can generate proper messages with proper context.
See my sig below. Make sure you read the URL reference before
posting again.

--
"If you want to post a followup via groups.google.com, don't use
the broken "Reply" link at the bottom of the article. Click on
"show options" at the top of the article, then click on the
"Reply" at the bottom of the article headers." - Keith Thompson
More details at: <http://cfaj.freeshell.org/google/>

By "most" USENET users, do you mean the ones that refuse to allow messages
to be stored beyond a few days? I seem to have absolutely no issues seeing
past messages, so long as they're not more than 20 days old (might want to
consider changing some settings, since not everybody replies within the same
day).

 

[Paul]

Well I have the part number of the memory now, but haven't tested yet :
it is : HYB25D512400BE-5
more info on it : 1Gb PC400 1205 AN 02 16C

I can't fint much info on the net
Anyone familiar with it ?

Page 11 Table 3 Line 7 ==> 128Mx4, PC3200, 3-3-3 Timing
http://www.infineon.com/upload/Docu...ponents/DS_512M_D11/HYB25D512xxxBx_rev162.pdf

I would not buy that memory for my computers on an unbuffered
module. That memory is intended for use on registered modules.
It may work on your computer, but don't expect to use multiple
modules of that type. At some point, the loading should be
too much. 64Mx8 memory chips would be a better choice, but
they cost more money (even though it is probably the same
silicon die being used).

Paul

 

[Jeroen]

Hmmm I believr yo but vould you please clarify :
That memory is intended for use on registered modules.
What is (un)registered and what is the use of it?

Multiple modules? I have 2 * 1024? What do you mean by: "the loading
should be
too much"?

thanx for replying.

 

[Paul]

Hmmm I believr yo but vould you please clarify :
That memory is intended for use on registered modules.
What is (un)registered and what is the use of it?

Multiple modules? I have 2 * 1024? What do you mean by: "the loading
should be
too much"?

thanx for replying.

Unregistered modules using 128Mx4 means there are 16 chips in one
bank. Not the more normal 8 chips. Any control signals which
normally drive 8 chips (control signals that are per-bank)
receive twice the loading.

http://www.portatech.com/catalog/memory.asp?ID=285

"Select this Value High Density (128x4 Based) 1GB module
if you have a system or motherboard with an SIS 648, 648fx,
746fx chipsets or Via P4X266A, KT600, PT800 chipsets."

AFAIK, Intel does not approve of modules with x4, but you
are welcome to experiment if you want. If one of those
modules doesn't work, then at least you have some kind
of explanation for why.

Intel memory guide for 875P chipset
ftp://download.intel.com/design/chipsets/applnots/25273001.pdf

"The following configurations are not valid:
* 64-Mb and 1-Gb Memory Technology
* x4,x32 DIMMS <----
* Double Sided X16 DIMMS
* Registered DIMMS."

The normal x8 modules would be acceptable, by that set of
rules.

Mushkin used to have a series of web pages, concerning the
testing of various memory configurations. They had a special
section on stacked 1GB DIMMs, and their testing showed that
while some chipsets, like the VIA and SIS chipset, could
drive the modules, there were hardly any chipsets that could
drive two or three modules. Since Mushkin made those web
pages uncacheable, I can no longer provide a reference
to them for you, or details of which chipsets were the
best.

By steering people towards modules using x8 chips, I'm
trying to ensure that when the modules are reused in a
new motherboard, there won't be problems with them. Why
invest in memory modules that won't work in all
motherboards ?

Paul

 

[Jeroen]

Thanks again Paul. Very valuable information.
If I had know it I would have bought other modules.

Well I guess I am lucky this time.

gr,
J